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/* $NetBSD: bwtworeg.h,v 1.2 1994/11/20 20:51:58 deraadt Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratory.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)bwtworeg.h 8.1 (Berkeley) 6/11/93
*/
/*
* bwtwo display registers.
*
* The registers start at offset 0x400000 and repeat every 32 bytes
* (presumably only the low order address lines are decoded). Video RAM
* starts at offset 0x800000. We use separate pointers to each so that
* the sparc addressing modes work well.
*/
struct bwtworeg {
/*
* The xxx0 range is all 0xff on my IPC but causes a screen glitch
* on my SS1+, so it must do *some*thing... the xxx1 range is full
* of values but I do not know what they are. bw_ctl changes for
* a blanked screen.
*/
char bw_xxx0[16];
u_char bw_ctl; /* contains video enable */
char bw_xxx1[15];
};
/* bits in bw_ctl */
#define CTL_VE 0x40 /* video enable */
/* offsets */
#define BWREG_ID 0
#define BWREG_REG 0x400000
#define BWREG_MEM 0x800000
/* same, but for gdb */
struct bwtwo_all {
long ba_id; /* ID = 0xfe010104 on my IPC */
char ba_xxx0[0x400000-4];
struct bwtworeg ba_reg; /* control registers */
char ba_xxx1[0x400000-32];
char ba_ram[4096]; /* actually larger */
};
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